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A new look at stress: abscisic acid patterns and dynamics at high‐resolution
Author(s) -
Jones Alexander M.
Publication year - 2016
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.13552
Subject(s) - abscisic acid , förster resonance energy transfer , abiotic stress , biology , dormancy , microbiology and biotechnology , botany , biochemistry , gene , fluorescence , physics , germination , quantum mechanics
Summary Abscisic acid ( ABA ) is a key phytohormone promoting abiotic stress tolerance as well as developmental processes such as seed dormancy. A spatiotemporal map of ABA concentrations would greatly advance our understanding of the cell type and timing of ABA action. Organ and tissue‐level ABA measurements, as well as indirect in vivo measurements such as cell‐specific transcriptional analysis of ABA metabolic enzymes and ABA ‐responsive promoters, have all contributed to current views of the localization and timing of ABA accumulations. Recently developed Förster resonance energy transfer ( FRET ) biosensors for ABA that sense ABA levels directly promise to add unprecedented resolution to in vivo ABA spatiotemporal mapping and expand our knowledge of the mechanisms controlling ABA levels in space and time.ContentsSummary 38 I. Introduction 38 II. ABA in the coordination of whole plant responses to water stress 39 III. Mapping developmental and stress‐induced ABA biosynthesis 39 IV. ABA on the move 41 V. ABA inactivation 41 VI. Direct biosensing for improved quantitation of ABA 41 VII. Conclusions 42Acknowledgements 42References 42